The body text is styled very differently on the home page and the other pages, you should normalize this. That said, the former is too big and light, and the latter is too small. You also have schizophrenic paragraph styling. Some are separated by blank lines, some aren't, some are separated by two or three blank lines.
Your capabilities page needs screenshots, the more the better. Ubuntu may have a design worth stealing shamelessly for this: http://www.ubuntu.com/netbook/features . The screenshots are big enough that you can tell what's going on, but not so big that they overwhelm the page. (In previous iterations, they were even better, because they cranked up the font sizes before taking screencaptures, but...)
The pitch on your front page is also... remarkably nebulous. Change is here! But I still don't know what exactly you do. I think 37signals does a good job at this sort of thing (http://highrisehq.com/), you could check that out.
Best of luck.
